San Dimas, CA (ZIP 91773) has experienced 194 recorded natural disaster events based on federal and state agency records. These include 127 wildfires, 63 earthquakes, and 2 hailstorms. Total documented property damage amounts to $25K.
With 127 recorded incidents (65% of all events), wildfires are the leading natural hazard for this ZIP code. Of these, 3 (2%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for wildfire-related events here is 4/5 (severe). The most recent recorded wildfire occurred on Nov 6, 2020.
Earthquakes account for 32% of the disaster record here, with 63 events documented. One event reached severity level 4 or 5 on the normalized scale. The highest recorded severity for seismic events here is 4/5 (severe). The most recent recorded earthquake occurred on Sep 7, 2025.
San Dimas has experienced 2 hailstorms on record. The most recent recorded hailstorm occurred on Mar 24, 2024.
San Dimas has experienced 1 tornado on record. Tornado-related events have caused a combined $25K in documented property damage. The most recent recorded tornado occurred on Nov 25, 1965.
San Dimas has experienced 1 severe wind event on record. The most recent recorded severe wind event occurred on Sep 2, 1998.
The most significant disaster event on record for San Dimas was EF1 Tornado on Nov 25, 1965, which caused $25K in property damage.
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Based on federal and state records, ZIP code 91773 has experienced 194 natural disaster events. The hazard types affecting this area include wildfires (127 events), earthquakes (63 events), hailstorms (2 events), tornado (1 event), and severe wind event (1 event). The primary hazard is wildfires, which account for 65% of all recorded events.
Wildfires are the most frequently recorded hazard in San Dimas, CA, with 127 events documented.
San Dimas has 1 recorded tornado event in the historical record. Total property damage from tornadoes in this area is $25K. The most recent tornado was recorded on Nov 25, 1965.
The most damaging natural disaster on record for ZIP code 91773 was EF1 Tornado, which occurred on Nov 25, 1965. This event caused $25K in documented property damage. It was rated at severity level 2/5.
Natural disasters have caused a documented total of $25K in property damage in the San Dimas, CA area (ZIP 91773). This figure is based on historical records from FEMA, NOAA Storm Events Database, and USGS, and covers events from the 1950s through the present. Actual damages may be higher, as not all events have complete damage assessments.
Data sourced from FEMA (disaster declarations, NFIP flood claims), NOAA Storm Events Database, USGS Earthquake Hazards Program, and NIFC wildfire records. Historical coverage varies by source, with most records beginning in the 1950s–1970s. Full methodology →